Page 561 - My FlipBook

Fias. S40-355. A seiies illustiating the Imilding uf all cohesive gold fillings in mesio-occUisal
cavities in the bicuspids and molars.
Fig. 310. An upper molar with a prepared mesio-occlusal cavity, showing' the convenience points
in the axio-bucco-gingival and axio-linguo-ging^ival angles.
Fig. 341. The plugger and holding instrument for the starting of gold fillings.
Fig. 342. The use of two instruments in starting cohesive gold fillings. The holding instrument
has its shank in such form in relation to the axis of ilie shaft that its jjoint is just enough above the
center so that it wiU always set up in the position wanted when the shaft is laid across the finger
and the point is dropped on a table. This form requires the minimum of care in holding the instni-
ment steady in the position in which it may be placed while doing other work with the right hand.
It also illustrates the beginning of the filling in the convenience point.
Fig. 343. The cavity with both conv.nience points filled.